Valve Int 66-77 Bt 2.000" 20-4256Nitrided ValveOne piece stainless steel, stellite tipped valve is fortified by a special nitrided process with . 002" depth and . 0002" surface buildup to improve wear properties and reduce friction This process provides resistance to corrosion; wears superior to hard chromium and electrolysis nickel plating Lightweight with profiles that provide excellent flow characteristics Compatible with leaded and unleaded fuels and can be run in cast iron and